Source: U.S. Department of Transportation, Bureau of Transportation Statistics, Pocket Guide to Transportation.
Composition of the GDP, United States, 1991-2013
Transportation (goods and services) accounts for about 9 to 10% of all the expenses in the US economy, the 4th most important expense after housing, health care and food. This share has remained relatively stable in time and is consistent with figures found across developed economies. This indicates that about one tenth of the efforts in an economy are related to providing and supporting the mobility of passengers and freight.